Study on the Mechanism between HPAM and Metal Ions by UV Spectrophotometry

Zuo Hua Wang; Jia Hui Zhang; Hua Zong; Wei Wang; Hong Bo Fang

doi:10.4028/www.scientific.net/AMM.333-335.1979

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 333-335Study on the Mechanism between HPAM and Metal Ions...

Study on the Mechanism between HPAM and Metal Ions by UV Spectrophotometry

Abstract:

Hydrolyzed polyacrylamide (HPAM) has been widely used for enhanced oil recovery in oil production. However, metal ions existed may reduce the system viscosity and further impact the displacement efficiency. Thus, it is of importance to know the mechanism between HPAM and metal ions. UV spectrophotometry method can be effectively applied in this work. It is suggested that the extent of various metal ions on HPAM viscosity is in the order of Fe²⁺ >Ca²⁺>Na⁺. By shielding effect, the presence of large amount of Na⁺ reduces HPAM solution viscosity. The result also demonstrates that multivalent cations can form polyion-metal complexes which affect the solution viscosity. The viscosity degraded by Fe²⁺is attributed to its reducing action. With oxygen in sewage, Fe²⁺ initiates a free radical reaction and causes the disintegration of the polymer.